Usher's syndrome, with special reference to heterozygous manifestations.
D000293:Adolescent; D000328:Adult; D000368:Aged; D001299:Audiometry; D002648:Child; D002675:Child, Preschool; D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D003623:Dark Adaptation; D003638:Deafness / Q000175:diagnosis / Q000235:genetics*; D004585:Electrooculography; D004596:Electroretinography; D005260:Female; D005684:Gait; D006579:Heterozygote; D006801:Humans; D008297:Male; D008875:Middle Aged; D009755:Night Blindness / Q000235:genetics; D012174:Retinitis Pigmentosa / Q000175:diagnosis / Q000235:genetics*; D014724:Vestibular Function Tests; D058609:Visual Field Tests